1255806887 has 2 divisors, whose sum is σ = 1255806888. Its totient is φ = 1255806886.

The previous prime is 1255806841. The next prime is 1255806907. The reversal of 1255806887 is 7886085521.

It is a strong prime.

It is an emirp because it is prime and its reverse (7886085521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1255806887 - 2⁶ = 1255806823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252806887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 627903443 + 627903444.

It is an arithmetic number, because the mean of its divisors is an integer number (627903444).

Almost surely, 2^1255806887 is an apocalyptic number.

1255806887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255806887 is an equidigital number, since it uses as much as digits as its factorization.

1255806887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1075200, while the sum is 50.

The square root of 1255806887 is about 35437.3656893398. The cubic root of 1255806887 is about 1078.8828431489.

The spelling of 1255806887 in words is "one billion, two hundred fifty-five million, eight hundred six thousand, eight hundred eighty-seven".